Isaac Witkin is principally known for his soft-edged, organic bronze pieces, such as 'HawthorneTree II, generated from Witkin’s improvised explorations of experimental foundry techniques in which molten bronze is directly poured onto a bed of sand. He would later weld the cooled bronze shapes together to complete the sculpture: “Rather than beginning with a drawing, my ideas are always conceived three-dimensionally. My language is generated from the free flow of metal drawn in molten states onto beds of sand.”